vm.h

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/*
 * (c) 2008-2009 Adam Lackorzynski <adam@os.inf.tu-dresden.de>,
 *               Torsten Frenzel <frenzel@os.inf.tu-dresden.de>
 *     economic rights: Technische Universität Dresden (Germany)
 *
 * License: see LICENSE.spdx (in this directory or the directories above)
 */
#pragma once
 
#include <l4/sys/err.h>
#include <l4/sys/types.h>


struct l4_vm_tz_state_mode
{
  l4_umword_t sp;
  l4_umword_t lr;
  l4_umword_t spsr;
};
 
struct l4_vm_tz_state_irq_inject
{
  l4_uint32_t group;
  l4_uint32_t irqs[8];
};

struct l4_vm_tz_state
{
  l4_umword_t r[13]; // r0 - r12
 
  l4_umword_t sp_usr;
  l4_umword_t lr_usr;
 
  struct l4_vm_tz_state_mode irq;
 
  l4_umword_t r_fiq[5]; // r8 - r12
  struct l4_vm_tz_state_mode fiq;
  struct l4_vm_tz_state_mode abt;
  struct l4_vm_tz_state_mode und;
  struct l4_vm_tz_state_mode svc;
 
  l4_umword_t pc;
  l4_umword_t cpsr;
 
  l4_umword_t pending_events;
  l4_uint32_t cpacr;
  l4_umword_t cp10_fpexc;
 
  l4_umword_t pfs;
  l4_umword_t pfa;
  l4_umword_t exit_reason;
 
  struct l4_vm_tz_state_irq_inject irq_inject;
};
 
enum L4_vm_exit_reason
{
  L4_vm_exit_reason_vmm_call   = 1,
  L4_vm_exit_reason_inst_abort = 2,
  L4_vm_exit_reason_data_abort = 3,
  L4_vm_exit_reason_irq        = 4,
  L4_vm_exit_reason_fiq        = 5,
  L4_vm_exit_reason_undef      = 6,
};
 
L4_INLINE int
l4_vm_tz_irq_inject(struct l4_vm_tz_state *state, unsigned irq);
 
L4_INLINE int
l4_vm_tz_irq_inject(struct l4_vm_tz_state *state, unsigned irq)
{
  if (irq > sizeof(state->irq_inject.irqs) * 8)
    return -L4_EINVAL;
 
  unsigned g = irq / 32;
  state->irq_inject.group   |= 1 << g;
  state->irq_inject.irqs[g] |= 1 << (irq & 31);
 
  return 0;
}